Backer-On Rock-On 1-1/4 in. cement board screws are designed for attaching Hardie Backer or equivalent fiber cement backer board to wood or light gauge steel studs. Backer-On Rock-On's patented serrated head design countersinks for flush seating at any angle, providing a smooth surface for tile. The Star drive recess with T-25 bit provides Stikfit for 1-handed installation. Backer-On Rock-On screws feature a Climacoat corrosion-resistant finish that prevents rust from bleeding into the grout and are perfect for use in high-moisture areas such as baths, showers, countertops, and floors. Conforms to ANSI A108.11 for cement board attachment. Backer-On Rock-On screws can be installed with a standard impact or drill/driver and product) for cement board fastening done right.
Brand Name: Backer-On
Sub Brand: Rock-On
Callout Size: No. 9
Length: 1-1/4 in.
Drive Style: Star
Head Type: Flat Head
Thread Type: Serrated
Product Type: Cement Board Screws
Number in Package: 185 pk
Driver Bit Included: Yes
Color: Green
Indoor or Outdoor: Indoor
Self Drilling: Yes
Finish: Zinc-Plated
Packaging Type: Clamshell
Application: Multi-Purpose
Material: Steel
Self Tapping: Yes
Drive Size: T25

Backer-On Rock-On No. 9 X 1-1/4 in. L Star Flat Head Serrated Cement Board Screws 185 pk